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Improving Freeze–Thaw Resistance of Concrete Road Infrastructure by Means of Superabsorbent Polymers

1
Energy & Materials in Infrastructure & Buildings (EMIB), Faculty of Applied Engineering, University of Antwerp, 2020 Antwerp, Belgium
2
Durable Building in Team (DUBiT), Department of Industrial Sciences & Technology, Odisee University College, 9320 Aalst, Belgium
3
Geological Consultancy, 3078 Meerbeek (Kortenberg), Belgium
*
Author to whom correspondence should be addressed.
Infrastructures 2018, 3(1), 4; https://doi.org/10.3390/infrastructures3010004
Received: 7 January 2018 / Revised: 28 January 2018 / Accepted: 29 January 2018 / Published: 31 January 2018
(This article belongs to the Special Issue Concrete Structures: Present and Future Trends)
The scope of the paper is to report an investigation on durability of infrastructure concrete for roads and bridges by creating a size and shape-designed pore systems in concrete in order to improve it, especially in terms of freeze–thaw resistance. By means of this experimental laboratory study, an alternative for usage of air entrainment agents (AEA) in concrete infrastructures was found in the way of using superabsorbent polymer materials (SAPs). The effect of the addition of SAPs of different amounts and different types into fresh concrete mix was investigated, including: compressive strength tests, weight loss measurements, visual and microscopic inspections and scanning electron microscopy (SEM) analysis. The detrimental strength reduction effect was not observed. The freeze–thaw procedure was varied, using different types of de-icing salts and heating/cooling regimes. It can be concluded that an improvement of the freeze–thaw resistance of concrete infrastructure depends on the particle size and optimal amount of SAPs added into concrete mix. The addition of 0.26 wt % of dry SAPs into the fresh concrete reference mix led to the significant decrease of scaling up to 43% after 28 freeze–thaw cycles. Both dosage and particle size of the SAPs had a significant impact on the obtained results and the freeze–thaw resistance in this experimental laboratory study. View Full-Text
Keywords: concrete road infrastructure; superabsorbent polymers (SAPs); freeze–thaw resistance; scaling concrete road infrastructure; superabsorbent polymers (SAPs); freeze–thaw resistance; scaling
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Craeye, B.; Cockaerts, G.; Kara De Maeijer, P. Improving Freeze–Thaw Resistance of Concrete Road Infrastructure by Means of Superabsorbent Polymers. Infrastructures 2018, 3, 4.

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